// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

package task

import (
	"context"
	"fmt"

	"github.com/kumose/errors"
	"github.com/kumose/kmopt/pkg/cluster/ctxt"
	"github.com/kumose/kmopt/pkg/cluster/module"
)

// SystemCtl run systemctl command on host
type SystemCtl struct {
	host         string
	unit         string
	action       string
	daemonReload bool
	checkactive  bool
	scope        string
}

// Execute implements the Task interface
func (c *SystemCtl) Execute(ctx context.Context) error {
	e, ok := ctxt.GetInner(ctx).GetExecutor(c.host)
	if !ok {
		return ErrNoExecutor
	}

	cfg := module.SystemdModuleConfig{
		Unit:         c.unit,
		Action:       c.action,
		ReloadDaemon: c.daemonReload,
		CheckActive:  c.checkactive,
		Scope:        c.scope,
	}
	systemd := module.NewSystemdModule(cfg)
	stdout, stderr, err := systemd.Execute(ctx, e)
	ctxt.GetInner(ctx).SetOutputs(c.host, stdout, stderr)
	if err != nil {
		return errors.Annotatef(err, "stdout: %s, stderr:%s", string(stdout), string(stderr))
	}

	return nil
}

// Rollback implements the Task interface
func (c *SystemCtl) Rollback(ctx context.Context) error {
	return ErrUnsupportedRollback
}

// String implements the fmt.Stringer interface
func (c *SystemCtl) String() string {
	return fmt.Sprintf("SystemCtl: host=%s action=%s %s", c.host, c.action, c.unit)
}
